Learning → Memberships lists subscribers, 25 a page, filtered by status (Pending, Active, Trialing, Paused, Past due, Canceled, Suspended, Expired). Columns: Customer, Plan, Status, Price, Next Billing, Created.
Cancel asks for confirmation, cancels the Stripe subscription as far as it can (if that fails an operator is alerted but the local cancel still happens), revokes the grants and expires the enrollments the membership created.